What does Lordosis refer to?

Lordosis specifically refers to the inward curvature of the lumbar spine, which is the lower back region of the spine. This curvature is a natural part of spinal alignment and can help provide balance and support to the body. It's important because an exaggerated lordosis can lead to discomfort or pain, while a healthy degree of lordosis is vital for proper posture and alignment.

In contrast, the other options involve different regions of the spine that do not pertain to lordosis. The thoracic spine refers to the upper and mid-back curvature, while the cervical spine includes the neck region. The sacral spine is located at the base of the spine and typically has a different curvature called sacral kyphosis. Each of these areas has its own specific curvature patterns that are distinct from lordosis.